Diagnostic device



FIG. 1 is a front isometric view of our new, original and ornamental design;

FIG. 2 is bottom isometric view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a back side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken dash lines in the diagnostic device are directed to environment and are for illustrative purposes only. The broken dash lines form no part of the claimed design. 

CLAIM The ornamental design for a diagnostic device, as shown and described. 